After reading a blog entry about persistent storage, I was under the impression that navigator.storage.persist()  should request the permission for persistance, so that the storage will not be cleared under pressure.
The method always returned false, unless I add the page to my bookmarks. This may work for progressive web apps, but AFAIK there is no way to add the web page to the bookmarks in the android web view (cordova app).
Is this the intended behaviour or rather a bug?
I'm thankfull for any hints!